单数句变复数句是七年级英语试题中的一个题型. 记住以下几要素即可迎刃而解:

1、人称代词主格单数变成相应的人称代词主格复数,即I-we; you-you; she/he/it-they

She is a girl. -They are girls.

2、 am, is变为are.

I am a student. We are students.

3、 不定冠词a/an要去掉或者变为some, any(肯定句及希望得到对方肯定回答的疑问句用some, 否定和疑问句用any)如:

He is a boy. They are (some) boys.

4、普通单数名词要变为复数形式。

It is a cat. They are cats.

5、指示代词this, that变为these, those.如:

This is a book. These are books.

6、Man, woman做定语修饰可数名词时,要在“数”上与被修饰名词保持一致,但其他名词修饰名词表示“性质”时,不作变化。如:

This is a woman doctor.

They are women doctors.

This is an ornage tree.

They are ornage trees.

7、反身单词也要变相应的复数形式

myself-ourselves yourself-yourselves himself/herself/itself-themselves

I am teaching myself computer.

We are teaching ourselves computer.

8、物主代词由单数变复数:

名词性物主代词:mine-ours yours-yours his/hers/its-theirs

形容词性主代词:my-our your-you his/her/its-their

This book is mine.—The books are ours.

This is her pen. – These are their pens.

一般情况下,形容词性物主代词在单数句变复数句时不变。当句中形容词性物主代词与句中的主语一致时,形容词性物主代词应随主语人称的变化而变化,仍要保持一致。

This is my pen. These are my pens.

He likes his bike. They like their bikes.

注意:单数句变为复数句时,句中的形容词、定冠词、副词、疑问词、介词短语和感叹词等保持不变。例如: Who is she? Who are they?

单数句变复数句规律(单数句变复数句规则)(1)

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